01 · Blocks
Which blocks sold for less?
Each block's median, low to high. The line runs from its cheapest sale to its dearest.
Blk 21 ranks the lowest of 3 blocks with two or more sales.
Blk 21 Hougang Ave 3
Postal code 530021. Resale prices since Nov 2024:
This blockBlk 21 Hougang Ave 312 min to Kovan · built 1977 with the 6 blocks in grey · 3–5 room, Executive · 50 years left
Nearest stations
Kovan MRT970 m to Exit C 12 min walk
Hougang MRT 14 min walk
Buangkok MRT 31 min walk
130 homes in this block
3‑room106
4‑room22
5‑room1
Executive1
- Completed
- 1977
- Storeys
- 12
- Lease
- 1978 to 2077
Under 45? You may get less CPF and a smaller HDB loan.
Blk 21 resale prices
S$500,888 to S$519,000
Three sales at Blk 21 since Nov 2024 · S$475, S$479 and S$492 psf
| Month | Storey | Size | Model | Price | PSF |
|---|---|---|---|---|---|
| Sep 2025 | 1–3 | 98 m² · 1055 sq ft | New Generation | S$505,000 | S$479 |
| Jun 2025 | 4–6 | 98 m² · 1055 sq ft | New Generation | S$519,000 | S$492 |
| Feb 2025 | 4–6 | 98 m² · 1055 sq ft | New Generation | S$500,888 | S$475 |
Against the blocks around it
4‑room sales since Nov 2024 at Blk 21, five blocks built with it and one other block within 250 m with leases from 1975 to 1981. In S$ per sq ft, so sizes compare.
02 · Floors
Do higher floors cost more?
The median for each storey band, across the same blocks.
Storeys 13–15 sold for more per sq ft than storeys 1–3.
03 · Months
How have prices moved?
Each month's median across these blocks, with a line from its cheapest sale to its dearest and the number sold. Blk 21's own sales.
The median went from S$505 psf in the first year to S$482 in the past year.
S$425,000
One 3‑room sale at Blk 21, in Jun 2026 · S$541 psf
| Month | Storey | Size | Model | Price | PSF |
|---|---|---|---|---|---|
| Jun 2026 | 1–3 | 73 m² · 786 sq ft | New Generation | S$425,000 | S$541 |
Against the blocks around it
3‑room sales since Nov 2024 at Blk 21, five blocks built with it and three other blocks within 250 m with leases from 1975 to 1981. In S$ per sq ft, so sizes compare.
01 · Blocks
Which blocks sold for less?
Each block's median, low to high. The line runs from its cheapest sale to its dearest.
Blk 21's one sale was S$541 psf.
02 · Floors
Do higher floors cost more?
The median for each storey band, across the same blocks.
Storeys 13–15 went for a median S$565 psf, against S$522 on storeys 1–3.
03 · Months
How have prices moved?
Each month's median across these blocks, with a line from its cheapest sale to its dearest and the number sold. Blk 21's own sales.
The median went from S$535 psf in the first year to S$538 in the past year.
No 5‑room resales at Blk 21
Nothing since Nov 2024. The charts show the blocks around it.
Against the blocks around it
5‑room sales since Nov 2024 at two blocks within 250 m with leases from 1975 to 1981. In S$ per sq ft, so sizes compare.
01 · Blocks
Which blocks sold for less?
Each block's median, low to high. The line runs from its cheapest sale to its dearest.
No 5‑room flats at Blk 21 resold since Nov 2024.
02 · Floors
Do higher floors cost more?
The median for each storey band, across the same blocks.
Storeys 13–15 sold for less per sq ft than storeys 10–12.
03 · Months
How have prices moved?
Each month's median across these blocks, with a line from its cheapest sale to its dearest and the number sold. Blk 21's own sales.
5 of 24 months had a 5‑room sale.
Blk 21 rents
S$2,700 to S$3,000 a month
What most 3‑room flats here rent for: 11 rentals at Blk 21 since Nov 2024, median S$3,000
Blk 21 11 other blocks around it Median across all of them
Each dot is a rental HDB approved since Nov 2024. Owners declare the rent and HDB doesn't check it, so treat single rentals with care.
Primary schools near Blk 21
Within 1 km · 3
- 1Holy Innocents' Primary School310 m
- 2Xinghua Primary School590 m
- 3Montfort Junior SchoolClose to the 1 km line980 m
1 to 2 km · 6
- 4CHIJ Our Lady of the Nativity1.1 km
- 5Xinmin Primary School1.1 km
- 6Punggol Primary School1.5 km
- 7Paya Lebar Methodist Girls' School (Primary)1.5 km
- 8Yio Chu Kang Primary School1.6 km
- 9Hougang Primary School1.8 km
Distances are straight lines from Blk 21 to each school's grounds, as MOE measures for Primary 1. Check ones near 1 km on OneMap.
Viewing a flat at Blk 21?
We're building an iPhone app for booking HDB viewings yourself. Share the PropertyGuru listing in and it gives you a link to send the seller's agent, so they can pick a slot when you're free.
Early access on TestFlight · iPhone
Before the viewing: What to WhatsApp the agent · The viewing checklist
Around Blk 21
Look up another block
Block details, resale prices and rentals come from HDB, building outlines from HDB's Existing Building dataset, MRT exits from LTA, schools from MOE and school grounds from URA's Master Plan, all published on data.gov.sg. Walking routes and map tiles are from OneMap by the Singapore Land Authority. Updated 26 Oct 2026.